Adaptive Internal Model Control for a Flexible Wing With Unsteady Aerodynamic Loads

Area of Science:

• Control Systems Engineering
• Aerospace Engineering
• Robotics

Background:

• Flexible wings are susceptible to distributed and boundary disturbances.
• Accurate output regulation is crucial for flight control systems.
• Exosystem uncertainties pose significant challenges in control design.

Purpose of the Study:

• To develop adaptive internal model controls for robust output regulation of flexible wings.
• To address challenges posed by unknown exosystem dynamics, disturbances, and references.
• To ensure internal asymptotic stability of the closed-loop control system.

Main Methods:

• Design of observer-based tracking error feedback controls for known exosystem matrices.
• Development of an adaptive observer for systems with unknown exosystem matrices.
• Integration of adaptive observers with observer-based controls for adaptive output regulation.

Main Results:

• The proposed adaptive observer ensures exponential convergence of the observer error system.
• Adaptive observer-based controls successfully regulate tracking errors to zero.
• The closed-loop system demonstrates internal asymptotic stability under unknown disturbances and references.

Conclusions:

• Adaptive internal model control provides a robust solution for flexible wing output regulation.
• The developed adaptive observer effectively handles unknown exosystem dynamics.
• The control strategy ensures stable and accurate performance in the presence of uncertainties.